Method for removing tin

Details Method for removing tin Method for removing tin

1998-04-16

1999-11-30

Gulakowski, Randy

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 3, 134 28, 134 29, 134 41, C23G 102, C23G 114

Patent

active

059935596

ABSTRACT:
In a method for removing tin from a surface and/or from a region close to the surface of a component part, the component part has a concentrated aqueous sodium hydroxide or concentrated hydrochloric acid flowing in contact with it at a temperature which is distinctly higher than room temperature. Preferably, the temperature is approximately 220.degree. C., and the component part is moreover subjected to a positive pressure of 5.5 bar. The method is suitable for a component part fabricated through the use of unidirectional solidification and liquid-metal cooling, in particular a turbine blade.

REFERENCES:
patent: 2357970 (1944-09-01), Rath
patent: 2711364 (1955-06-01), Beach
patent: 3121005 (1964-02-01), Edwards
patent: 4164542 (1979-08-01), Deren
patent: 4687545 (1987-08-01), Williams et al.
patent: 5290362 (1994-03-01), Sue
"Handbuch der Galvanotechnik", manual for galvanotechnics, part III, pp. 340-341, Carl Hanser Verlag, Munich, 1969.

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